ASTM F877-2020 pdf free download

ASTM F877-2020 pdf free download.Standard Specification for Crosslinked Polyethylene (PEX) Hot- and Cold-Water Distribution Systems
1. Scope
1.1 This specification covers requirements, test methods, and marking requirements for system components when tested with nominal SDR9 crosslinked polyethylene (PEX) tubing as a system. Systems are intended for 100 psi (0.69 MPa) water service up to and including a maximum working temperature of 180 °F (82 °C). Requirements and test methods are included for materials, workmanship, dimensions and tolerances, burst pressure, hydrostatic sustained pressure, excessive temperature and pressure, corrosion resistance, and thermocycling tests. The components covered by this specification are intended for use in, but not limited to, residential and commercial hot and cold potable water distribution systems or other applications such as reclaimed water, fire protection, municipal water service lines, radiant heating and cooling systems, hydronic distribution systems, snow and ice melting systems, geother- mal ground loops, district heating, turf conditioning, com- pressed air distribution, and building services pipe. 1.2 The text ofthis specification references notes, footnotes, and appendixes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification. 1.3 The values stated in inch-pound units are to be regarded as the standard. The values stated in parentheses are provided for information only. N OTE 1—Suggested hydrostatic design stresses and hydrostatic pressure ratings for tubing and fittings are listed in Appendix X1. Design, assembly, and installation considerations are discussed in Appendix X2. An optional performance qualification and an in-plant quality control program are recommended in Appendix X3. For additional information on the use of PEX tubing for high-temperature non-potable applications and for chlorinated potable water, see PPI Technical Notes 52 and 53, respectively.1.4 The following safety hazards caveat pertains only to the test method portion, Section 7, of this specification: This standard does not purport to address all ofthe safety concerns, ifany, associated with its use. It is the responsibility ofthe user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Terminology
3.1 The terminology used in this specification is in accor- dance with Terminology F412, Terminology D1600, and Sym- bols D2749, unless otherwise specified. The abbreviation for crosslinked polyethylene is PEX. Plastic tubing denotes a particular diameter schedule of plastic pipe in which outside diameter of the tubing is equal to the nominal size plus 1 ⁄ 8 in. Plastic pipe outside diameter schedule conforms to ANSI B 36.10. 3.2 Definitions ofTerms Specific to This Standard: 3.2.1 crosslinked polyethylene plastics—a polyethylene ma- terial that has undergone a change in molecular structure through processing whereby a majority of the polymer chains are chemically linked. 3.2.2 fitting—a piping component used to join or terminate sections of PEX tubing or to provide changes of direction or branching in a piping system. This includes appurtenances such as couplings, elbows, tees, or plugs used to connect tubing or as an accessory to tubing. 3.2.3 standard dimension ratio (SDR)—the ratio of outside diameter to wall thickness. For PEX tubing, it is calculated by dividing the average outside diameter ofthe tubing in inches or in millimeters by the minimum wall thickness in inches or millimeters. If the wall thickness calculated by this formula is less than 0.070 in. (1.78 mm) it shall be arbitrarily increased to 0.070 in. except for nominal tubing sizes 5 ⁄ 16 and smaller, as specified in Table 3. The SDR values shall be rounded to the nearest 0.5. 3.2.4 manifold—an appurtenance that has at least one inlet and multiple outlets with integral fittings, valves, or both. 3.2.5 system components—fittings, valves with integral fittings, and manifolds which connect directly to PEX tubing made in accordance with Specification F876. 3.2.6 system component assembly—system component con- nected directly to PEX tubing made in accordance with Specification F876.